Chelsea forward Alvaro Morata has revealed how he hit back at a fan who told him he isn't even worth £20million.

The Spaniard joined the Blues from Real Madrid for £67million in the summer, after they missed out on signing Romelu Lukaku.

But he's proven to be a perfect alternative and a great replacement for the departing Diego Costa, and has already notched seven times this season.

For the most part everyone has had positive things to say about the forward, who has taken to the Premier League like a duck to water.

Alvaro Morata has scored seven Premier League goals so far this season (Image: AFP)

Chelsea legend Frank Lampard recently told Omnisport: "He's been very impressive, Morata. He's scored regularly, he's a very complete striker, he has everything – speed, quality on the ball, his movement is fantastic and he can score goals.

"The goal against Manchester United... the quality of the finish with his head was top class. I like him a lot and I think he's going to score many goals in the Chelsea team and in the Premier League."

But Morata acknowledged you will always have critics.

Frank Lampard is a big fan of the former Real Madrid forward

Speaking to Cadena Ser during the international break, the ex-Los Blancos ace opened up about a dispute he had with a fan, revealing what the man said to him and his response.

"The other day someone told me your agent must be Harry Potter since you aren't worth 20 million so I asked him how much he was worth - there will always be people ready to criticise," said the Spanaird.